The Nile deep-sea fan: An example of interacting sedimentation, salt tectonics, and inherited subsalt paleotopographic features

Loncke, Lies; Gaullier, Virginie; Mascle, J.; Vendeville, Bruno C.; Camera, L.

doi:10.1016/j.marpetgeo.2006.01.001

Cited by 173 publications

(181 citation statements)

References 33 publications

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“…In the Mediterranean Sea, the first mud volcanoes were discovered in the accretionary prism of the western Hellenic arc (Cita et al 1981) and in the central Mediterranean Ridge with the well known Olimpi mud volcano field (Cita and Camerlenghi 1990;Huguen et al 2004;Ivanov et al 1996). Since these discoveries, numerous fluid seepage related seabed structures have been identified in the Anaximander Mountains (Woodside et al 1998), along the Florence Rise (Woodside et al 2002;Zitter 2004), in the Levant Basin (Coleman and Ballard 2001), as well as in the Nile Deep Sea Fan Loncke et al 2004;Mascle et al 2001Mascle et al , 2006. Bathymetry and acoustic imagery maps of the seafloor obtained with shipborne multibeam echosounders (Loubrieu et al 2001;MediMap Group et al 2005) have played a key role in the discovery of fluid escape structures in the eastern Mediterranean Sea.…”

Section: Fluid Seepage In the Eastern Mediterraneanmentioning

confidence: 99%

“…The Nile Deep Sea Fan hosts numerous active fluid escape structures (Bayon et al 2009;Huguen et al 2009;Loncke et al 2004;Mascle et al 2006) including several large gas emitting mud volcanoes (Dupré et al 2007). These latter are characterized by emissions of thermogenic methane and higher hydrocarbons (de Lange et al 2006;Mastalerz et al 2007).…”

Section: New High-resolution Dataset On the Nile Marginmentioning

confidence: 99%

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High-resolution mapping of large gas emitting mud volcanoes on the Egyptian continental margin (Nile Deep Sea Fan) by AUV surveys

Dupré¹,

Buffet²,

Mascle³

et al. 2008

Mar Geophys Res

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Two highly active mud volcanoes located in 990-1,265 m water depths were mapped on the northern Egyptian continental slope during the BIONIL expedition of R/V Meteor in October 2006. High-resolution swath bathymetry and backscatter imagery were acquired with an autonomous underwater vehicle (AUV)-mounted multibeam echosounder, operating at a frequency of 200 kHz. Data allowed for the construction of *1 m pixel bathymetry and backscatter maps. The newly produced maps provide details of the seabed morphology and texture, and insights into the formation of the two mud volcanoes. They also contain key indicators on the distribution of seepage and its tectonic control. The acquisition of highresolution seafloor bathymetry and acoustic imagery maps with an AUV-mounted multibeam echosounder fills the gap in spatial scale between conventional multibeam data collected from a surface vessel and in situ video observations made from a manned submersible or a remotely operating vehicle.

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Section: Fluid Seepage In the Eastern Mediterraneanmentioning

confidence: 99%

Section: New High-resolution Dataset On the Nile Marginmentioning

confidence: 99%

High-resolution mapping of large gas emitting mud volcanoes on the Egyptian continental margin (Nile Deep Sea Fan) by AUV surveys

Dupré¹,

Buffet²,

Mascle³

et al. 2008

Mar Geophys Res

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“…Dula, 1991;Childs et al, 1993;Hardy and McClay, 1999;Vendeville, 2005) and (3) the topography of the basement (regional and local slope) (e.g. Crans et al, 1980;Koyi, 1991;Koyi et al, 1993;Mauduit et al, 1997;Loncke et al, 2006). At higher frequencies of thousands to hundreds of thousand years the interactions between fault evolution and sedimentary process still remains less understood partly because, at these time scales, it is difficult to assess one independently of the other.…”

Section: Introductionmentioning

confidence: 99%

High-resolution record of tectonic and sedimentary processes in growth strata

Pochat

Castelltort

Choblet

et al. 2009

Marine and Petroleum Geology

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a b s t r a c tGrowth strata are used to determine the kinematics of synsedimentary structures such as faults. Classical methods of analysis such as thickness versus throw plot consider that the available space created by fault slip in the hanging wall of faults is instantaneously filled up by sediments. This has lead many previous works to identify a cyclic activity for growth faults. Here we perform a careful analysis of the variation of strata thicknesses on each side of a very well documented normal growth fault in the Niger delta. We show that these thickness variations are induced by the alternation of sedimentary processes during continuous fault slip. Suspended-load processes induce either uniform or slightly variable thickness of a large majority of mudstone layers. Bedload processes result in a preferential thickening of sand layers in the hanging wall. These high quality data thus provide strong grounds for doubting the polycyclic growth diagnosed for some faults at the scale of sedimentary cycles and supports the notion that fault displacement rates can be very well behaved. Our study emphasizes the important conclusion that stable fault growth, and related displacement rates, can appear to be punctuated when viewed at the scale of sedimentary cycles. It follows that care should be taken when attempting to derive displacement rates on temporal scales equivalent to those of alternating sedimentological cycles.

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“…The Mediterranean basin shows complex structural and geodynamic contexts which are difficult to connect to each other, as confirmed in accurate seismic profiles and the analysis of sedimentary deposits [35]. Besides candidate Tectonic Vortexes, in the Meditarranean basin salt domes are present, which derive from a vertical dynamics and may as well be found in basins different in terms of crust dynamic [36][37][38] and not synchronous as to the timeline considered [39]. The presence of a seemingly unrelated vortex tectonics, with the exception of regional scales, suggests that a mechanism may have operated also in the preceding eras, though nowadays it is hardly recognizable.…”

Section: From Local To Globalmentioning

confidence: 99%

Vortex Theory and Earth Dynamics

Straser¹,

Ferrari²

2016

JGRE

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Morphological evidence in active tectonic areas consisting of subcircular shapes suggests that these geometries may originate from alternative mechanisms to those described by translational dynamics of complex faults. The mechanics behind endogenic forces, in particular convection currents, hasn't been completely explained. Differing in density from upward flows developing in atmosphere and in water, magma upwelling from the mantle can trigger endogenic vortexes in particular conditions and due to Coriolis Force. At their onset and ascent phase, vortexes apply lateral forces as result of rotation, open their way toward the surface and over time stabilize the channel. Opposite to a rising linear flow which compacts overlying materials impeding their surge, vortex flows unload the materials externally and compact them on the lateral surface of the channel, thus making it more regular and stable. Torsional movements on the surface associated to vulcanites, lateral ramps and subcircular elevations, can be observed. Other phenomena that may be consequence of vortex dynamics are the volcanic cones showing pseudo-rotations in the morphologies surrounding the crater. In this study we suggest a modeling for a vortex theory which may explain the Earth dynamics in terms of spiraling movement and magma upwelling stabilizing over time.

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The Nile deep-sea fan: An example of interacting sedimentation, salt tectonics, and inherited subsalt paleotopographic features

Cited by 173 publications

References 33 publications

High-resolution mapping of large gas emitting mud volcanoes on the Egyptian continental margin (Nile Deep Sea Fan) by AUV surveys

High-resolution mapping of large gas emitting mud volcanoes on the Egyptian continental margin (Nile Deep Sea Fan) by AUV surveys

High-resolution record of tectonic and sedimentary processes in growth strata

Vortex Theory and Earth Dynamics

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